Current status of sea turtle protection in Lamu Seascape, Kenya: Trends in nesting, nest predation and stranding levels

Temporal and spatial trends in sea turtle nest protection, predation and mortalities in the Lamu archipelago, Kenya were investigated based on nesting beach monitoring efforts conducted among five locations comprising 34 beaches. The nesting data was collected for a period of 17 years from 1997 – 2013 through beach patrols using standardized protocols while mortality data spanned from 2001 – 2013.  The causes of mortality were determined through general external examination. The green turtle, hawksbill, olive ridley and loggerhead turtle were recorded in the area. Out of a total of 2,017 nests recorded, 64.4% (n = 1299) were translocated while 10.2% were predated. Predation levels were not significantly affected by seasonality (p > 0.05); although the levels were lower during the wet Southeast Monsoon (SEM) season (9.2 ± 2.2 %) compared to the Northeast Monsoon (NEM) season (14.8 ± 3.0 %). A total 227 mortality cases were recorded between 2001 and 2013 of which fishery- related causes were the highest representing 53%. This was followed by unknown causes which constituted 20%, shark attacks (13%) and the tumor causing viral disease fibropapillomatosis (11%). Overall, the highest number of mortalities was recorded for Mkokoni (35%) while the lowest was recorded for Mvundeni (4%). Green turtles comprised 79% of the mortality cases recorded with a mean size range of 68.9 ± 1.9 cm CCL. The incidences of mortality occurred year-round; however, the incidence of strandings was higher during the dry NEM season in the months of January to March when fishing effort is also highest. The success of sea turtle conservation efforts in the Lamu seascape is clearly demonstrated by the increased nesting activity over time, as well as the reduced trend on sea turtle nest predation levels. To continue this success, it is vital that sea turtle conservation efforts including a comprehensive monitoring programme are supported

Marine turtles of the African east coast: current knowledge and priorities for conservation and research

International audienceAlthough published literature regarding the 5 species of marine turtle found along the continental African east coast has grown substantially over the last decades, a comprehensive synthesis of their status and ecology is lacking. Using a mixed methods approach, which combined an exhaustive literature review and expert elicitation, we assessed the distribution and magnitude of nesting, foraging areas, connectivity, and anthropogenic threats for these species in Somalia, Kenya, Tanzania, Mozambique, and South Africa. A complex pattern of nesting sites, foraging areas, and migration pathways emerged that identified areas of high importance in all 5 countries, although significant data gaps remain, especially for Somalia. Illegal take, bycatch, and loss of foraging and nesting habitat were identified as the most serious anthropogenic threats. Although these threats are broadly similar along most of the coast, robust data that enable quantification of the impacts are scarce. Experts identified regional strengths and opportunities, as well as impediments to turtle conservation. Topics such as legislation and enforcement, collaboration, local stakeholders, and funding are discussed, and future directions suggested. Given the projected growth in human population along the continental African east coast and expected accompanying development, anthropogenic pressures on turtle populations are set to increase. Stronger regional collaboration and coordination within conservation and research efforts are needed if current and future challenges are to be tackled effectively